GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 Vibe - FWD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC C1381

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C1381: Yaw Rate Circuit Malfunction

Circuit/System Description

The electronic brake control module (EBCM) monitors the deceleration of the vehicle for Antilock Brake System (ABS) operation.

Conditions for Running the DTC

Vehicle speed is above 3 km/h (2 mph).

Conditions for Setting the DTC

The EBCM detects a malfunction in the deceleration sensor.

Action Taken When the DTC Sets
    • The ABS is disabled.
    • The ABS warning indicator turns ON.
    • The traction control and vehicle stability control (VSC) is disabled.
    • The VSC warning indicator turns ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Verify DTC U0123, U0124, or U0126 are not set?
    2. ⇒ If DTC U0123, U0124, or U0126 is set, refer to appropriate DTC.
  2. Verify DTC C1212, or C1336 are not set?
    3. ⇒ If DTC C1212, or C1336 is set, refer to appropriate DTC.
  3. Verify yaw rate sensor is correctly installed.
    4. ⇒ If yaw rate sensor is not correctly installed, correct installation of yaw rate sensor and using a scan tool perform yaw rate sensor calibration.

Circuit/System Testing
  1. Ignition OFF, disconnect the yaw rate sensor connector.
  2. Test for less than 1 ohm between the terminals 1 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, check for 11-14V between terminal 4 and ground.
    4. ⇒If the voltage is not as specified, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the yaw rate sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Brake Pressure Modulator Valve Replacement
    •  Control Module References for EBCM replacement, setup, and programming